改性硅藻土深度处理城市污水厂尾水的实验研究

Experimental research on advanced treatment of outlet water from municipal wastewater treatment plant by modified diatomite

以机械加速澄清池为反应器,采用改性硅藻土处理城市污水厂尾水,研究其不同投加量对尾水中污染物去除效果的影响。结果表明,随着投药量的增加,尾水中COD、TP、TN和氨氮的去除率也提高;考虑经济性因素,确定改性硅藻土最佳投量为30 mg/L,此时COD、TP、TN和氨氮的去除率分别为45.8%、62.9%、21.7%和36.8%,去除效果比较理想。

Using a mechanical accelerated clarifier as reactor,the application of modified diatomite in the advanced treatment of outlet water from municipal wastewater treatment plant was studied and the effect of different dose on the removal of pollutants was discussed.The results show that the removal rates of COD,TP,TN and ammonia nitrogen of outlet water can rise with the incresing of dose.Taking the economic factors into account,when the optimal dose of modified diatomite was 30 mg/L,the romoval rates of COD,TP,TN and ammonia nitrogen were 45.8%,62.9%,21.7% and 36.8%,respectively.